Freeze Frame Data
- DESCRIPTION
Freeze frame data records the engine conditions (fuel system, calculated load, engine coolant temperature, fuel trim, engine speed, vehicle speed, etc.) when a malfunction is detected. When troubleshooting, it can help determine if the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was Lean or Rich, and other data from the time the malfunction occurred.
HINT:
If it is impossible to duplicate the problem even though a
DTC is detected, confirm the freeze frame data.
The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the Techstream, 5 separate sets of freeze frame data can be checked.
- 3 data sets before the DTC was stored.
- 1 data set when the DTC was stored.
- 1 data set after the DTC was stored.
These data sets can be used to simulate the condition of the vehicle around the time of the occurrence of the malfunction. The data may assist in identifying the cause of the malfunction, and in judging whether it was temporary or not.
- LIST OF FREEZE FRAME DATA FREEZE FRAME DATA
Tester Display Measurement Item Diagnostic Note Injector (Port) Injection period of No. 1 cylinder - IGN Advance Ignition advance - Calculate Load Calculated load Calculated load by ECM. Vehicle Load Vehicle load - MAF Mass air flow volume If approximately 0.0 g/sec: - Mass air flow meter power source circuit open or short.
- VG circuit open or short.
If 160.0 g/sec. or more:- E2G circuit open.
Engine Speed Engine speed - Vehicle Speed Vehicle speed Speed indicated on speedometer. Coolant Temp Engine coolant temperature If -40°C (-40°F), sensor circuit open. If 140°C (284°F) or more, sensor circuit shorted. Intake Air Intake air temperature If -40°C (-40°F), sensor circuit open. If 140°C (284°F) or more, sensor circuit shorted. 2nd Air System Status Second air system status - Air-Fuel Ratio Ratio compared to stoichiometric level - Purge Density Learn Value Learning value of purge density - Evap Purge Flow Ratio of evaporative purge flow to intake air volume - EVAP (Purge) VSV EVAP purge VSV duty ratio - Knock Correct Learn Value Correction learning value of knocking - Knock Feedback Value Feedback value of knocking - Accelerator Position No. 1 Absolute Accelerator Pedal Position (APP) No. 1 - Accelerator Position No. 2 Absolute APP No. 2 - Throttle Position Sensor Output Throttle position - Throttle Sensor Position Throttle sensor positioning - Throttle Sensor Position #2 Throttle sensor positioning #2 - Throttle Motor DUTY Throttle motor - O2S B1 S2
O2S B2 S2Heated oxygen sensor output Performing Control the Injection Volume or Control the Injection Volume for A/F Sensor function of Active Test enables technician to check output voltage of sensor. AFS B1 S1
AFS B2 S1A/F sensor output Performing Control the Injection Volume or Control the Injection Volume for A/F Sensor function of Active Test enables technician to check output voltage of sensor. AFS B2 S1 A/F sensor current - Total FT #1
Total FT #2Total fuel trim - Short FT #1 Short-term fuel trim Short-term fuel compensation used to maintain air-fuel ratio at stoichiometric air-fuel ratio. Long FT #1 Long-term fuel trim Overall fuel compensation carried out in long-term to compensate a continual deviation of short-term fuel trim from central value. Short FT #2 Short-term fuel trim Short-term fuel compensation used to maintain air-fuel ratio at stoichiometric air-fuel ratio. Long FT #2 Long-term fuel trim Overall fuel compensation carried out in long-term to compensate a continual deviation of short-term fuel trim from central value. Fuel System Status (Bank 1) Fuel system status (for Bank 1) - OL (Open Loop): Has not yet satisfied conditions to go closed loop.
- CL (Closed Loop): Using heated oxygen sensor as feedback for fuel control.
- OL Drive: Open loop due to driving conditions (fuel enrichment).
- OL Fault: Open loop due to detected system fault.
- CL Fault: Closed loop but heated oxygen sensor, which used for fuel control, malfunctioning.
Fuel System Status (Bank 2) Fuel system status (for Bank 2) - OL (Open Loop): Has not yet satisfied conditions to go closed loop.
- CL (Closed Loop): Using heated oxygen sensor as feedback for fuel control.
- OL Drive: Open loop due to driving conditions (fuel enrichment).
- OL Fault: Open loop due to detected system fault.
- CL Fault: Closed loop but heated oxygen sensor, which used for fuel control, malfunctioning.
O2FT B1 S2
O2FT B2 S2Fuel trim at heated oxygen sensor - AFFTB1 S1 Fuel trim at A/F sensor - AFS B1 S1 A/F sensor current - Catalyst Temp (B1 S1)
Catalyst Temp (B2S1)Estimated catalyst temperature (for Sensor 1) - Catalyst Temp (B1 S2)
Catalyst Temp (B2 S2)Estimated catalyst temperature (for Sensor 2) - Sub O2S Impedance B1S2
Sub O2S Impedance B2S2Sub heated oxygen sensor impedance (for Sensor 2) - Initial Engine Coolant Temp Engine coolant temperature at engine start - Initial Intake Air Temp Intake air temperature at engine start - Injection Volum (Cylinder 1) Injection volume - Air pump pressure (absolute) Air pump pressure - Air Pump Pulsation Pressure Air pump pulsation pressure - Air Pump2 Pressure (Absolute) Air pump pressure - Air Pump2 Pulsation Pressure Air pump pulsation pressure - Power Steering Pressure Power steering pressure sensor - SPD (SP2) Output shaft speed - SPD (NT) Input shaft speed Data is displayed in increments of 50 rpm. ACC Relay ACC relay status - Starter Relay Starter relay status - Starter Signal Starter switch (STSW) signal - Starter Control Starter switch status - Power Steering Switch Power steering switch status - Power Steering Signal Power steering signal (history) This signal status is usually ON until the cables are disconnected from the battery terminals. Closed Throttle Position SW Closed throttle position switch - A/C Signal A/C signal - Neutral Position SW Signal Park/Neutral position (PNP) switch signal - Electrical Load Signal Electrical load signal - Stop Light Switch Stop light switch - Immobiliser Communication Immobiliser communication - Fuel Cut Condition Fuel cut condition - Battery Voltage Battery voltage - Atmosphere Pressure Atmosphere pressure - Secondary Air Control VSV Secondary air injection system status - ACIS VSV VSV for Acoustic Control Induction System (ACIS) - ACT VSV A/C cut status for Active Test - VVT Control Status (Bank 2) VVT control status - EVAP Purge VSV EVAP Purge VSV - Fuel Pump/Speed Status Fuel pump/speed status - VVT Control Status (Bank 1) VVT control status - Vacuum Pump Key-off EVAP system leak detection pump status Refer to EVAP SYSTEM (See ). EVAP System Vent Value Key-off EVAP system vent valve status - TC and TE1 TC and CG (TE1) terminals of DLC3 - Al Test Secondary air injection system operation prohibit - Engine Speed of Cyl #1 Engine speed for cylinder 1 - Engine Speed of Cyl #2 Engine speed for cylinder 2 - Engine Speed of Cyl #3 Engine speed for cylinder 3 - Engine Speed of Cyl #4 Engine speed for cylinder 4 - Engine Speed of Cyl #5 Engine speed for cylinder 5 - Engine Speed of Cyl #6 Engine speed for cylinder 6 - Engine Speed of Cyl #7 Engine speed for cylinder 7 - Engine Speed of Cyl #8 Engine speed for cylinder 8 - Av Engine Speed of All Cyl Engine speed for all cylinders - VVT Aim Angle (Bank 1) VVT aim angle - VVT Change Angle (Bank 1) VVT change angle - VVT OCV Duty (Bank 1) VVT OCV operation duty - VVT Ex Hold Lrn Val (Bank 1) VVT exhaust hold duty ratio learning value (Bank 1) - VVT Ex Chg Angle (Bank 1) VVT exhaust change angle (Bank 1) - VVT Ex OCV Duty (Bank 1) VVT exhaust OCV duty (Bank 1) - VVT Aim Angle (Bank 2) VVT aim angle - VVT Change Angle (Bank 2) VVT change angle - VVT OCV Duty (Bank 2) VVT OCV operation duty - VVT Ex Hold Lrn Val (Bank 2) VVT exhaust hold duty ratio learning value (Bank 2) - VVT Ex Chg Angle (Bank 2) VVT exhaust change angle (Bank 2) - VVT Ex OCV Duty (Bank 2) VVT exhaust OCV duty (Bank 2) - Idle Fuel Cut Fuel cut idle ON: when throttle valve fully closed and engine speed over 3500 rpm. FCTAU Fuel cut during very light load Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete. Ignition Ignition counter - Cylinder #1 Misfire Count Cylinder #1 misfire Only displayed during idling. Cylinder #2 Misfire Count Cylinder #2 misfire Only displayed during idling. Cylinder #3 Misfire Count Cylinder #3 misfire Only displayed during idling. Cylinder #4 Misfire Count Cylinder #4 misfire Only displayed during idling. Cylinder #5 Misfire Count Cylinder #5 misfire Only displayed during idling. Cylinder #6 Misfire Count Cylinder #6 misfire Only displayed during idling. Cylinder #7 Misfire Count Cylinder #7 misfire Only displayed during idling. Cylinder #8 Misfire Count Cylinder #8 misfire Only displayed during idling. All Cylinders Misfire Count All cylinders misfire Only displayed during idling. Multi Cylinders Misfire Count Multiple cylinder misfire - Misfire RPM Engine speed when misfire occurred - Misfire Load Engine load when misfire occurred - Misfire Margin Margin to detect engine misfire - Catalyst OT MF F/C Catalyst over temperature misfire prevention F/C - Cat OT MF F/C History Catalyst over temperature misfire prevention F/C history - Cat OT MF F/C Cylinder#1 Display of fuel cut operation in No. 1 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#2 Display of fuel cut operation in No. 2 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#3 Display of fuel cut operation in No. 3 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#4 Display of fuel cut operation in No. 4 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#5 Display of fuel cut operation in No. 5 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#6 Display of fuel cut operation in No. 6 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#7 Display of fuel cut operation in No. 7 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder#8 Display of fuel cut operation in No. 8 cylinder (if certain level of misfire malfunction is detected) - Engine Run Time Accumulated engine running time - Time after DTC Cleared Cumulative time after DTC cleared - Distance from DTC Cleared Accumulated distance from DTC cleared - Warmup Cycle Cleard DTC Warm-up cycle after DTC cleared -